Watchcase wrench



C. A. BURNS Nov. 27, 1945.

WATCHCASE WRENCH Filed April 29, 1944 Patented Nov. 27, 1945 I UNITEDSTATES PATENT omce' WATCHCASE WRENCH Clyde A. Burns, Corpus Christi,Tex. Application April 29, 1944, Serial No. 533,336

2 Claims.

This invention relates to wrenches, and more particularly to a wrenchdesigned for removing the bezel or back of a Waterproof watch,

In waterproof watches the back is screwed onto the body of the watch,and in order to have the watch moisture tight, the back and the bezel ofthe watch are formed with a plurality of notches or recesses forreceiving a tool so as to loosen or tighten the back. It is, therefore,an object of this invention to provide a wrench or tool which is readilyadjustable so that it can be adjusted to fit various sizes of backs.

Another object of this invention is to provide a wrench which can beused with watches having two or more notches, the wrench embodying aseries of lugs which are adjustable and, if desired, oneor more lugs maybe removed or shifted out of the way so that the desired lugs may beused to loosen or tighten the back of the watch.

In the drawing:

Figure 1 is a detail top plan partly broken away and in section of awrench constructed according to an embodiment of this invention;

Figure 2 is a sectional view taken on the line 2-2 of Figure 1 Figure 3is a fragmentary sectional View take on the line 3-3 of Figure 2;

Figure 4 is a detail side elevation of one of the lugs; and

Figure 5 is a bottom plan partly broken away of the wrench showing themanner in which the wrench is used for a watch back having threenotches.

Referring to the drawing, the'numeral I designates generally adisc-shaped wrench body which is formed in the lower side thereof with apair of crossed channels The channels I! are of tapered construction,and the body I0 is also formed with a pair of crossed slots |2 whichopen through the upper side of the body l0 and communicate with .thechannels The body ID has secured thereto a pair of diametricallydisposed handles |3 which are formed at their inner ends with reducedthreaded studs l4 engaging in threaded sockets l carried by the bodyIll.

The body In is adapted to have positioned in the lower side thereof, andprojecting from the channels H, a plurality of lugs or pins It. The lugsor pins l6 are formed at their upper ends with tapered portions II whichare adapted to engage in the tapered channels II, and the lugs or pinsl6 are also formed with reduced threaded studs I8 loosely engagingthrough the slots I2.

A thumb or wing nut I9 is threaded onto the stud- I8 and is adapted totightly hold the lug or pin I6 in adjusted position lengthwise of achannel I I. The lug I6 at its lower end is formed with a beveledportion 20 forming a reduced thickness nose 2|. The nose 2| is adaptedto engage in a notch or recess formed in the back of a watch so thatwhen the body I0 is turned, the back may .lBa parallel with the axis ofthe lug and is then curved outwardly, as indicated at 23. This cutoutportion 22 is designed for the purpose of permitting the lug to clearthe crown or other portion of the watch. The lug 16a is formed with areduced thickness nose 24 having the lower surface 25 thereof inclinedupwardly and inwardly. Nose 24- has the lower surface thereof inclinedas at 25 so that proper clearance will be provided to clear anyornamentations which may be on the outer portion of the watch.

In the use and operation of this wrench, where the watch back is formedwith four notches, there are four lugs |6, as shown in Figure 1, mountedin the crossed channels The lugs l6 are adjusted relative to each otherwithin the channels I I by loosening the wing nuts l9, the positions ofthe lugs being such as to provide for the nose 2| of each lug engagingin a notch of the watch back, The nuts H! are then tightened so that theseveral lugs will be firmly secured in the channels II and will not moverelative to each other or to the plate or body l0. The nose 2| of eachlug is then engaged in the notch of a watch back, whereupon the handles[3 are turned so as to turn the entire wrench, and with the turning ofthe wrench the watch back will be either loosened or tightened relativeto the body of the watch.

What is claimed is:

1. A wrench comprising a flat body formed with a tapered channel openingthrough one side thereof and with a slot extending lengthwise of saidchannel and communicating therewith, a pair of work engaging membersextending from one side of said body, each member being formed at oneend thereof with a tapered end portion for binding engagement with thetapered sides of said channel, said slot forming a pair of shoulders atthe inner end ofsaid channel and constituting a limiting means for saidmembers, a threaded stud carried by each member loosely extendingthrough said slot, and a nut threaded on each stud for locking saidmembers in adjusted position lengthwise of said channel.

2. A wrench comprising a flat body formed with a pair of crossed,tapered channels opening through one side thereof and with a pair ofcrossed slots extending lengthwise of and communicating with saidchannels, a pair of work engaging members in each channel and extendingeach member loosely extending through said slots,

and a nut on each stud for locking said members in adjusted positionlengthwise of said channels.

CLYDE A. BURNS.

